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Pairs of Numbers

Stage: 1 Challenge Level: Challenge Level:1

1-10

If you have ten counters numbered $1$ to $10$, how many can you put into pairs that add to $10$?

Can you use them all?
Say how you got your answer.
 
 

Now put the counters into pairs to make $12$.
  • Can you use them all?
  • Say how you got your answer.
Now put the counters into pairs to make $13$.
  • Can you use them all?
  • Say how you got your answer.

Now put the counters into pairs to make $11$.
  • Can you use them all?
  • Say how you got your answer.
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.